Valve



I. A. LE CAIN.

VALVE.

Patented Feb. 7, 1922.

i7 @di APPLICATION FILED SERT. I4. 1920.

SOHN

LE GAIN, 0F MALDEN, MASSACHUSET'JIS, ASSIGNOR TO WORTHINNGTON PUMP AND MACHINERY CORPORATION, A CORPORATIONDF VIRGINIA..

Patented Feat, 1922..

VALVE.

1,405,525, specification of Letter; Patent. Y Application filed September 14, 1920. Serial No. 410,110.

To all 'whom'it may come/m.'

Be it known that I, JOHN A. LE GAIN, a.l citizen of the United States, residing at Malden, county of Middlesex, and State of\y Massachusetts, lhave invented certain new and useful Improvements in Valves, fully describedand represented in the following specification and the accompanying drawin forming a part of the same.

gIghis invention relates to improvements in valves for pumps, compressors or the like, and relates especially .to a valve service of the type in which the suction and discharge valves are arranged in line and are readily removable as a unit and detachable for ad- -justments and replacements or for insertion ofa'substitute service with a minimum of delay.

In such valve services, it has been necessary that the machined holes through the valve decks'wh-ich receivethe valve seats be carefullyaligned and that the facings of the valve decks against which the valve seats bear be parallel, and one important feature of the invention is the provision of a cheap, compact and efficient valve service in which the careful aligning of the valve seats and the paralleling of the valve deck facings is unnecessary.

In the accompanying drawing forming a part of this speciication, a vertical section of a valve service embodying all the features of the invention in their preferred form is shown, and 'this construction will now be described in detail and the fe'aturcs forming lthe invention then specifically pointed out in the claims.

Referring to the drawing, valve chamber A, which is closed by cover B, is provided with suction and discharge valvedecks 10, 11 which receive, respectively, the suctionand discharge valve seats 12, 13, the suction valve seat 12 being secured in deck 10 in any suitable manner as by drivin in on' the taper. Suitable .suction and hdlscharge valves 14, 15, preferably of the form'shown comprising one or more annular plates 1, seat respectively against the suction and discharge valve seats 12, 13, the discharge valve 15' being guided by a guide 16 having screw threaded ends 17, 18 engaging, re.

vspectively, the discharge valve seat 13 and lTal valve guard 19, `against whichl -the discharge valve sprin 2O bears. A suction valve guard 23', agalnst which suction valve spring 24 bears, is secured tol 'the discharge valve seat 13, as by casting integrally therewith, and is provided wlth a recessed or hollow portion k2.

One of the important featuresI of myinventio-n consists in providing a guide for the suction valve such that the suction valve will seat land b e properlyv guided even though the suction and discharge ports are 'l not in exact alignment and the valve deck facings are not exactly parallel. This .result is secured by mounting the valve guide loosely so as to have a slight play, and preferably it is of the'form shown in which suction valve 14 is guided by a guide 3 which extends into and its somewhat loosely within the hollow portion 2 of the Suction valve guard 23 and is loosely secured thereto as by cotter pin 4 passin through holes 5 in the suction valve guar 23, andhole 6 in the suction valve gulde 3. In order that the service may beremoved as a unit, the lower end of the valve guide 3, which iits loosely withina recess 7 1n the suction valve seat l2,l is preferably formed with a head 8' adapted to engage and remove the suction valve 14: with the other parts, so that the entire valve service is assembled and disassembled on the bench, as is most convenient. 'Ihe suction valve guard, therefore, is fixed to the discharge valve Seatv and withdrawn with it, although there` is no rigid connection between the discharge valve Seat and the suction valve'guide or seat. p

While the construction shown in connection with the suction valve is of especial value in combination with another valve in line-therewith, and such combination forms a part of the invention, it will b e understood that this construction is applicable also to a single valve, either suction or discharge, independently of` its relation to other valves, and certain features ofthis construction are thus broadly claimed.

Suitable means are provided for holding the valve service in position, which may adheld in position by a projection 22 on the cover B extending nearly t the valve guard 19. v j

lLeakage is reducedvto a minimum as the present construction does not use a binding g screw above the valve service or a holding 'GES rllhere is no danger of the parts coming adrift as the discharge valve guard, guide and seat are securely held by the heavy spring which holds the whole valve service in position, and upon failure of this spring for any reason the arts areheld by contact between the disc arge valve guard and the projection 22 on cover B. rll`he suction valve bolt is held by the cotter pin so that there is no chance of it coming free from the suction valve guard, and the latter is xed to the discharge valve seat, preferably a part of the dischargevalve seat casting, as shown. There is no tendency of the removable discharge valve seat to loosen the suction valve seat as the suction valve guard and guide connected to the discharge valve seat are not rigidly connected to the suction valve seat. The discharge valve seat, therefore, may have a loose fit in the deck, so as to be readily withdrawn and leakage between the valve seat and deck prevented by the metal t0 metal ground joint between the top of the valve deck and the underside of the valve seat flange.

While the construction shown and described is a preferred embodiment of my invention, it will be understood that many modifications may be made therein Within the invention as defined by the claims.

What is claimed is:

1. A valve structure having a plurality of valve seats in line, valves on the seats, anda loosely mounted guide for one of the valves. l

2. A valve service having suction and discharge valve seats in line, valves on the seats, and a loosely mounted guide for one of the valves.

3. A valve service having Suction and discharge valve seats in line, valves on the seats, a suction valve guard fixed to the dis charge valve seat, and a loosely mounted guide for the suction valve connected to the discharge valve seat.

4. A valve service having suction and discharge valve seats in line, valves on the seats, a loosely mounted guide tor the suction valve connected to the discharge valve The seat, and means on the guide for removal of the suction valve with the discharge valve and its seat as a unit.

5. A valve service having suction and .discharge valve seats in line, valves on the seats, connections between the valves and discharge valve seat whereby these parts may be removed as a unit, and resilient means for holding the discharge valve seat and connected parts in place.

6. A valve service having suction and discharge valve seats in line, valves von the seats, connections between the valves and the discharge valve seat whereby these parts may be removed as a unit, a spring for hold.- ing the discharge valve seat and connected parts in place, and a cap for holding the sprin and formed to prevent floating of the ischarge valve seat upon failure of the spring.

7. A valve service having suction and d1scharge valve seats in line, valves on the seats, a loosely mounted guide for the suction valve connected to the discharge valve seat and resilient means for holding the parts in place. f

8. A valve service having suction and discharge valve seats in line, valves on the seats, a loosely mounted guide for the suction valve connected to the discharge valve seat, means on the guide for rremoval of the suction valve with the discharge valve and its seat as -a unit, and resilient means for holding the discharge valve seat and concnected parts in place.

9. A valve service having suction and discharge valve seats in line, valves on the seats, guards and valve springs for the valves, the suction valve guard being fixed to the discharge valve seat, and a guide for the 'suction valve loosely secured to the suction valve uard.

10. valve service having suction and discharge valve seats in line, valves on the seats, guards and valve springs for the valves, the suction valve guard being xed to the discharge valve seat and a guide for the suction valve loosely secured to the suction valve guard and adapted to remove the suction valve with the discharge'valve seat and its valve as al unit.

l1. A valve service having suction and discharge valve seats and valves in line, the discharge valve seat being free from its valve deck, and a connection between the discharge valve seat and suction valve for removing the latter with the discharge valve seat independently of the suction valve seat.

12. A valve service having suction and discharge valve seats and valves in line, the discharge valve seat being vfree for removal from its valve deck and the suction valve seat fixed in its valve deck, and a valve guide for the suction valve connected to the discharge valve seat but loosely Vmounted to 32,30

momma permit the valve-seats to be somewhat out of alignment and parallelism.

13. A valve structure comprising a valve seat, a valve thereon, and a loosely mounted stationary guide for the valve.

14. A valve structure comprising a valve seat, a valve thereon, a guard for the valve independent of the seat, and a stationary guide for the valve loosely mounted-on the guard.

15. A valve structure comprising a valve seat, a valve thereon, a guard for the valve independent of the seat, a guide yfor the valve loosely mounted on the guard, and

guard independently of the seat.

means for removal of the valve with the 16. The combination w1th a fixedvalve seat and its valve, of valve guard 23 inde` 3 fitting loosely within the recesses 2 and 7 a non-rigid connection between guide 3 an guard 23, and head 8 on guide-3 for removal of the valve with guide 3 and guard 23.

18. The combination with a fixed valve seat, a valve seat free for removal from its valve deck, and valves on the seats, of valve guard 23 fixed to the free valve seat and formed with a recess 2, recess 7 in the fixed valve seat, valve guidel 3 fitting loosely within the recesses 2 and 7, a non-rigid connection between guide 3 and guard 23 comprising cotter pin 4 passing through the guard 23, and head 8 on guide 3 for removal of the other valve with the free valve seat and its valve.v 3

1n `testimony whereof, l have hereunto set my hand.

JOHN A. LE GAIN. 

